Police officers detain a protester during a demonstration against the lockdown imposed to slow the spread of the coronavirus disease (COVID-19), in Berlin, Germany, May 2, 2020. REUTERS/Christian Mang

BERLIN: German politicians expressed alarm on Monday (May 11) over anti-lockdown protests held in major cities at the weekend, warning that conspiracy theorists and others with an agenda were exploiting frustration with measures to contain the coronavirus pandemic.